Specialist Offshore Equipment

Suite 9, Red Tree Business Suites, 24 Stonelaw Road, Rutherglen, Glasgow, G73 3TW

Tel +44 (0)141 613 2138

Mud Density Trannsmitter


Mud Density Meter

Supplied through AMS Equipment Ltd, the ’290 series’ is a mud and slurry density transmitter specifically for use in the onshore and offshore oil and gas market. It is the first fluid density transmitter that is fully submersible for use in drilling mud and fluid circulation tanks.

This density transmitter is rugged yet accurate, providing reliable measurement of the density or specific gravity in drilling mud holding tanks and return sumps.

The 290 Series transmitter measures density as a function of differential pressure. Each unit has two pressure sensitive diaphragms mechanically separated by a fixed distance on a mounting pole. Under normal operation, with both diaphragms submerged and the distance between them fixed, any variation in the pressure differential between them must be a function of the liquid density. The diaphragms are protected by enclosure cages to prevent damage from mechanical impact or debris.

Features and Benefits
  • Density transmitter for drilling mud and slurry designed to be installed in recirculation and storage tanks
  • Simple and flexible pole-mounting installation from the top-of-tank
  • Remote transmitter suitable for installation in hazardous area
  • Robust and reliable construction for arduous duty
  • Sensors protected by stainless steel cage removable for cleaning
  • Temperature compensated measurement with low thermal sensitivity




  • Construction: Body assembly 316L stainless steel with diaphragms Hastelloy C276
  • Mounting: Submersed in tank
  • Standard Range: Normal calibration 6.67 to 20 Pounds / US Gallon (0.8 to 2.4 SG) with alternative calibrations optional
  • Sensor capillary fill fluid: Silicon oil
  • Operating temperature: -10 to +80° C
  • Hazardous area rating (option): EEx ia IIC T6

Amplifier Module

  • Construction: Wall mount GRP enclosure
  • Enclosure rating: IP65 (IP67 option) / NEMA 4X
  • Power supply: 12 to 35 Vdc
  • Signal output: 4 to 20 mA dc, 2 wire.


  • Accuracy: +/- 0.25% of set span
  • Temp coefficient: +/- 0.02% set span / °C
  • Slurry tanks
  • Storage tanks
  • Offshore platforms
  • Onshore processing plants